How does gas lead to bloating?
The Canadian Society of Intestinal Research confirmed that intestinal gas is made up of oxygen, nitrogen, carbon dioxide, hydrogen and methane.
Oxygen, nitrogen, and carbon dioxide come from swallowed air (exogenous), which can contribute to that bloated feeling.
Hydrogen and methane are by-products of the breakdown of food by good bacteria (known as probiotics) naturally residing in the colon.
The organisation noted: “As gas builds up, the abdomen may painfully distend, especially right after eating.